中北大学学报（自然科学版）2025，Vol.46Issue(3)：379-388,10.DOI:10.62756/jnuc.issn.1673-3193.2024.11.0001
低功率AC-HVAF热喷涂的模拟及纯铝涂层的制备
Simulation of Low-Power AC-HVAF and Preparation of Pure Aluminum Coating
宋超 1刘富强 1薛勇 1王高 2刘云1
作者信息
- 1. 中北大学 材料科学与工程学院,山西 太原 030051
- 2. 中北大学 信息与通信工程学院,山西 太原 030051
- 折叠
摘要
Abstract
Activated combustion high-velocity air-fuel(AC-HVAF)is a novel supersonic flame thermal spray technology that involves complex problems relating to high-speed compressible fluid dynamics and fluid-solid coupling.Previous studies focused on the high-power AK-07 gun which was usually suitable for producing high melting point coatings,but less research had been done on the low-power AK-05 gun.In this paper,a two-dimensional model was established with AK-05 spray gun as the research object,and then the fluid velocity,fluid temperature and fluid composition distribution of AK-05 spray gun were analyzed based on computational fluid dynamics.In addition,the present study calculated the velocity and temperature variations of aluminum particles of different particle sizes as they passed through the flow field using a discrete phase model,which was validated by the preparation of actual aluminum coatings.The fluid velocity and temperature in the simulation results show that the AK-05 gun is characterized by both high jet velocity and low jet temperature;In particular,the incorporation of auxiliary fuel hydrogen will significantly reduce the jet tem-perature,with a maximum potential temperature decrease of 300 K.The fluid composition distribution in the simulation results suggest that oxygen in the air can rapidly intrude into the jet stream,which may lead to an increase in the oxygen content of the coating.The velocity and temperature of the particles in the results indicate that small particles are fast and have a high probability of been superheated and melted,while the opposite is true for large particles.Both simulated and actual aluminum coatings have shown that the AK-05 gun is suitable for the preparation of low melting point coatings.关键词
AC-HVAF喷涂/AK-05喷枪/喷涂流场Key words
AC-HVAF spray/AK-05 spray gun/flow field of thermal spray分类
金属材料引用本文复制引用
宋超,刘富强,薛勇,王高,刘云..低功率AC-HVAF热喷涂的模拟及纯铝涂层的制备[J].中北大学学报（自然科学版）,2025,46(3):379-388,10.
